Fix number of monitors found (#42/#43/#51)

- I used my laptop connected to a HDMI TV to solve this issue (The GUI was HUUUUGE)
- On multi-monitor system, to get the GUI normal, the system layout scale should be 100%, not more than this

src/lib/ui-helper.psm1

@@ -14,13 +14,18 @@ function Get-CurrentResolution {
     [OutputType([System.Object[]])]
     param ()
 
-    $NumberOfScreens = (Get-CimInstance -Class "Win32_VideoController" | ForEach-Object { "$_" }).Count
+    # Adapted from: https://www.reddit.com/r/PowerShell/comments/67no9x/comment/dgrry3b/?utm_source=share&utm_medium=web2x&context=3
+    $NumberOfScreens = (Get-CimInstance -Namespace root\wmi -ClassName WmiMonitorBasicDisplayParams | Where-Object { $_.Active -like "True" }).Active.Count
     $ScreenWidth = $null
     $ScreenHeight = $null
 
+    Write-Verbose "Num. of Monitors: $NumberOfScreens"
+
     If ($NumberOfScreens -eq 1) {
         # Accepts Scaling/DPI
         [System.Windows.Forms.SystemInformation]::VirtualScreen | ForEach-Object {
+            Write-Verbose "W: $($_.Width) | H: $($_.Height)"
+
             If (!$ScreenWidth -or !$ScreenHeight) {
                 $ScreenWidth = $_.Width
                 $ScreenHeight = $_.Height
@@ -34,6 +39,8 @@ function Get-CurrentResolution {
     } Else {
         # Doesn't accepts Scaling/DPI (rollback method)
         Get-CimInstance -Class "Win32_VideoController" | ForEach-Object {
+            Write-Verbose "W: $($_.CurrentHorizontalResolution) | H: $($_.CurrentVerticalResolution)"
+
             If (!$ScreenWidth -or !$ScreenHeight) {
                 $ScreenWidth = $_.CurrentHorizontalResolution
                 $ScreenHeight = $_.CurrentVerticalResolution